Function librbd_sys::rbd_get_parent_info

pub unsafe extern "C" fn rbd_get_parent_info(
    image: rbd_image_t, 
    parent_poolname: *mut c_char, 
    ppoolnamelen: size_t, 
    parent_name: *mut c_char, 
    pnamelen: size_t, 
    parent_snapname: *mut c_char, 
    psnapnamelen: size_t
) -> c_int